Ruling · Dattātreyotpatti (Datta Jayanti) · 1993

Tuesday 28 December

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 599 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two evenings

One ghaṭī is 24 minutes. Pradoṣa is 2 muhūrtas after sunset.

Evening of Tuesday 28 December

Taken. The only evening Pūrṇimā reaches.

17:03 sunsetpradoṣa ends 19:00
16:3917:0317:2717:5118:1518:3919:0319:27

116 of 116 minutes covered

Evening of Wednesday 29 December

Pūrṇimā is absent from pradoṣa. Not taken.

17:04 sunsetpradoṣa ends 19:00
16:4017:0417:2817:5218:1618:4019:0419:28

0 of 116 minutes covered

Pūrṇimā presentPradoṣa, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Pūrṇimā runs from 07:01 on Tue 28 Dec to 07:05 on Wed 29 Dec.

    1993-12-27T23:01:00Z → 1993-12-28T23:05:23Z

  2. 02

    Kāla

    Pradoṣa is 2 muhūrtas after sunset: 17:03–19:00 on the 28th, 17:04–19:00 on the 29th.

    pradosha: night-muhurta-1-2 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Pūrṇimā must be present during pradoṣa. It covers 116 of 116 minutes on the 28th and 0 of 116 on the 29th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one evening qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 35912 s

  5. 05

    Ruling

    Dattātreyotpatti, Baoding, 1993: Tuesday 28 December.

    confidence: determinate

Say it like this

In Baoding, Dattātreyotpatti (Datta Jayanti) 1993 falls on Tuesday 28 December. Pūrṇimā runs from 07:01 on Tue 28 Dec to 07:05 on Wed 29 Dec and covers all of pradoṣa that evening.

ahargana.org/baoding/festivals/1993/dattatreyotpatti · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingTue 28 Dec
Ahargaṇa, classicalDisc centre, no refractionTue 28 Dec
compat-drikpanchangComparison profileTue 28 Dec
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/dattatreyotpatti · ruleset 2026.3-draft

Month
Mārgaśīrṣa, amānta
Pakṣa · aṅga
Śukla · Pūrṇimā
Kāla
Pradoṣa
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 15 Dattatreyotpatti (pradosa).” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlacePūrṇimāSunset 27thCoveredSunset 28thCoveredRuled
Los Angeles15:01 → 15:0516:51113 min16:520 min27 Dec
Chicago17:01 → 17:0516:2684 min16:2739 min27 Dec
Jersey City18:01 → 18:0516:3532 min16:3689 min28 Dec
Port of Spain19:01 → 19:0517:5231 min17:5373 min28 Dec
London23:01 → 23:0515:570 min15:58129 min28 Dec
Durban01:01 → 01:0518:580 min18:5980 min28 Dec
Dubai03:01 → 03:0517:370 min17:38107 min28 Dec
Delhi04:31 → 04:3517:320 min17:32109 min28 Dec
Kolkata04:31 → 04:3517:000 min17:01106 min28 Dec
Singapore07:01 → 07:0519:070 min19:0796 min28 Dec
Sydney10:01 → 10:0520:080 min20:0877 min28 Dec
Suva11:01 → 11:0518:430 min18:4486 min28 Dec
Profile · tradition
pac-rp@2026.1 · smarta
Rule
dattatreyotpatti@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

About Ahargaṇa